Method and terminal for searching for an access point

Abstract

Specifically, according to one embodiment of the present invention, a method for searching for an access point is provided. The method for searching may comprises the steps of: a terminal measuring the position thereof; checking an access point located near the measured position of the terminal; determining whether or not the distance between the terminal and the access point is greater than the radius range searchable by the terminal; and searching for the access point when the distance between the terminal and the access point is less than the radius range.

What is claimed is: 
     
       1. A method of searching for an access point, the method comprising:
 measuring a position of a terminal by the terminal; 
 checking the access point located near the position of the terminal obtained from a measurement result; 
 determining whether a distance between the terminal and the access point is greater than or equal a radius range searchable by the terminal; and 
 if the distance between the terminal and the access point is less than the radius range searchable by the terminal, searching for the access point and accessing the access point when the access point is found by the search and is accessible, 
 wherein a cell ID of a base station to which the terminal belongs at the time of the access is stored, and 
 wherein, if the distance between the terminal and the access point is greater than or equal to the radius range searchable by the terminal, a timing point of a next position measurement is determined and a search for the access point is stopped until the determined timing point. 
 
     
     
       2. The method of  claim 1 , further comprising:
 determining whether received signal strength (RSS) of a signal received from a serving base station is greater than a threshold value, 
 wherein, if the RSS is greater than the threshold value, the operations of  claim 1  are performed. 
 
     
     
       3. The method of  claim 1 , further comprising:
 if the distance between the terminal and the access point is greater than the radius range searchable by the terminal, checking whether the terminal has accessed the access point before in a coverage of a currently accessed serving base station; and 
 controlling a search interval according to whether the terminal has accessed the access point before. 
 
     
     
       4. The method of  claim 1 , further comprising determining whether the distance between the terminal and the access point is greater than a service radius of the access point. 
     
     
       5. The method of  claim 1 , wherein the timing point of the next position measurement is determined by a time resulted from dividing a distance between the terminal and a nearest access point from the terminal by a speed of the terminal for a specific time. 
     
     
       6. A terminal, which is able to access a mobile communication base station and an access point, the terminal comprising:
 a position measuring unit; 
 a first transmitting/receiving unit configured to transceive a signal with the mobile communication base station; 
 a second transmitting/receiving unit configured to transceive a signal with the access point; and 
 a controller configured to:
 control the position measuring unit to measure a position; 
 control the position measuring unit to check the access point located near the position of the terminal obtained from a result of the measurement; 
 control the position measuring unit to determine whether a distance between the terminal and the access point is greater than or equal to a radius range searchable by the terminal; 
 if the distance between the terminal and the access point is less than the radius range searchable by the terminal:
 control the second transmitting/receiving unit to search for the access point; and 
 access the access point when the access point is found by the search and is accessible, 
 
 wherein a cell ID of a base station to which the terminal belongs is stored, and 
 wherein, if the distance between the terminal and the access point is greater than or equal to the radius range searchable by the terminal, the controller is further configured to:
 determine a timing point of a next position measurement, and 
 control the position measuring unit to stop searching for the access point until the determined timing point. 
 
 
 
     
     
       7. The terminal of  claim 6 , wherein:
 the controller is further configured to measure received signal strength (RSS) of the signal received from the base station via the first transmitting/receiving unit; and 
 if the RSS is greater than a threshold value, a search is performed. 
 
     
     
       8. The terminal of  claim 6 , wherein:
 if the distance between the terminal and the access point is greater, the controller is further configured to check whether the terminal has accessed the access point before in a coverage of a currently accessed serving base station; and 
 the controller is further configured to control a search interval according to whether the terminal has accessed the access point before. 
 
     
     
       9. The terminal of  claim 6 , wherein:
 the controller is further configured to determine whether the distance between the terminal and the access point is greater than a service radius of the access point; and 
 if the distance between the terminal and the access point is less than the service radius of the access point, a search is performed.